Just dynoed a 555" bb chev. 11:1 CR with AFR 325 CNC'd chambers only. Short runner went 335 cfm, didn't flow the long one. Decent GM dual plane, solid roller with, I believe, 256/264 on a 112 with 650'ish lift. Pump gas, finally squeaked 653 hp @ 5800 rpm and peaked 680 ft lbs @ 4200 rpm. 3500-5700 it never dropped below 600 ft lbs. Going into a '69 corvette. Oughta be a halfshaft bustin' beast. If it ever gets traction.
Also built a 408 mopar. 11.5:1 compression with Indy oval port heads that I ported on. 570 hp @ 6200 rpm. Hydraulic roller that really is too small for this engine, but it'll make a nice little package that shouldn't require much maintenance. Torque was 539 ft lbs @ 5000-5100 rpm. 500 ft lbs from 4300-5900. This was on 110 leaded, but only because I was afraid of loading the motor that hard on the dyno on pump fuel.